More data:
ADD-DAR (H/U fare). Minimum bid used to be $ 250, now set to $ 200. Understandable, since Y is routinely oversold and C mostly half full, if even.
ADD-DXB (fare?). Minimum bid $ 220 - Mrs. got accepted (twice) and upgraded both ways few weeks ago.
ADD-CAN (L/H fare). Minimum bid $ 600.